The ix2-dl is a capable marvel 6282 / kirkwood based NAS with two drive bays, 256mb ram and 1gb of nand flash.
After running mine on Debian for many years I have now created openWRT images for this box.
Source, install instructions and pre-build images (19.07 and 21.02 rc4) are available on github;
usb to tty-serial adapter, connected to the tty header on the ix2 mainboard. Header is populated from the factory. Easiest access is through the front panel - remove the panel, drives, remove 5 screws and the header is available on the lower right hand side.
ext2 formatted usb drive or (preferably) tftp server.
- fan and temp control
- nothing - build works fine in my testing.
Performance is good for file sharing and disk access.
Any questions feel free to ask here or GitHub issues page.